These five astronauts comprised the STS-98 crew that launched into Earth orbit aboard the Space Shuttle Atlantis on February 7, 2001. Pictured right front is Kenneth D. Cockrell, mission commander; and Mark L. Polansky, pilot (left front); along with astronauts Marsha S. Ivins, Robert L. Curbeam, Jr., (left rear) and Thomas D. Jones (right rear), all mission specialists. During 3 space walks totaling 20 hours, the crew installed the U.S. Laboratory named Destiny onto the International Space Station (ISS). The addition of the Destiny Lab brought the ISS mass to about 101.6 metric tons (112 tons).